Optics: motion pictures – Methods – Recording
Patent
1976-03-11
1978-05-16
Hayes, Monroe H.
Optics: motion pictures
Methods
Recording
352 58, 352 40, 352133, G03B 3500
Patent
active
040895971
ABSTRACT:
My invention relates to photographing scenes with standard motion picture photographic equipment in which there is a relative motion between the scene and camera with the purpose of stereoscopic viewing of the motion picture or stationary reproduction without the need for viewing aids at the eyes. The system is compatible with scenes photographed without this relative motion, where with the reproduction is viewed in conventional two dimensions.
The surface of the processed film (or other appropriate media) is arrayed in a vertical plane and constrained to move horizontally around a segment of a circle of radius 2R. At the center of the film circle is a film motion compensator which can be a multi faceted mirror drum of radius R. The film is rapidly scanned about the center of this circle by a light source directed through the film and toward the center of the mirror drum. The optical film scanner contains projection optics on the inside of the film circle that rotates the bright central image at the mirror drum centerline by a fixed 90.degree. and develops a horizontally scanning and circularly moving pseudo projection point to provide a suitably large and erect picture format on a semi-specular and circular viewing screen having both horizontal and vertical elements. The rotating pseudo projection point scans and repeats at a rate to exceed the flicker frequency of the eye. The horizontal elemental screen characteristics cause the projected rays to vertically diffuse. The vertical elemental screen characteristics cause the reflections of the sweeping central projection ray to remain parallel as it leaves the screen toward the observer's eyes. The vertical elements also cause the whole images projected by the pseudo projection point, to converge at the vertical pseudo slit position. The angular velocity of the pseudo slit is equal to the angular velocity of the scanning pseudo projection point. An alternate semi-specular curved screen is constructed with horizontal ridges over the whole screen width to cause vertical diffusion of the projected light and to develop the circularly moving pseudo vertical viewing slit. If the film and motion compensator remain stationary, the stereoscopically reproduced scene is also stationary. If the film and motion compensator are in locked motion as the film is scanned by the optic scanner, the picture will move and stereoscopic motion pictures can be observed without any form of visual aid at the observer's eyes.
REFERENCES:
patent: 1265352 (1918-05-01), Merrill et al.
patent: 1963438 (1934-06-01), Greensfelder
patent: 2002090 (1935-05-01), Ives
patent: 3199116 (1965-08-01), Ross
patent: 3201797 (1965-08-01), Roth
patent: 3463581 (1969-08-01), Clay
patent: 3482913 (1969-12-01), Glenn
patent: 3743394 (1973-07-01), Meszlenyi
patent: 3815979 (1974-06-01), Collender
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